Burner construction

ABSTRACT

A waste burner has a fire pile enclosed by a shell open at the top. A collector is mounted in the shell independently of the shell by a skeletal structure which is exterior of the shell and also supports recirculating ducts which draw off gases and unburned particles from the collector. Blowers reintroduce these gases and particles tangentially into the lower portion of the shell. The outlets of the blowers are spaced around the shell and each blower outlet is directed at a point just behind the next adjacent blower.

United States Patent [72] Inventor Jerry S. Lausmann P.0. Box 1608, Mediord, Oreg. 97501 [21] Appl. No. 21,135 [22] Filed Mar. 19, 1970 [45] Patented Dec. 21, 1971 [54] BURNER CONSTRUCTION 11 Claims, 5 Drawing Figs.

[52] U.S.Cl 110/7 R, 110/49 R, 110/119 [51] Int. Cl F23g 5/00 [50] Field of Search ll0/7,7 A, 8, 18,49,97, 119

1561 Relerences Cited UNITED STATES PATENTS 2,455,201 ll/l948 Wallis et al. 110/97 Berry et al. .1 110/119 3,440,977 4/1969 Yoe, Jr. 110/7 X 2,804,031 8/1957 Douglass,.lr.. 110/18 2,608,169 8/1952 Sparks et al. 110/18 X Primary Examiner-Kenneth W. Sprague AttorneyBuckhorn, Blore, Klarquist and Sparkman ABSTRACT: A waste burner has a fire pile enclosed by a shell open at the top. A collector is mounted in the shell independently of the shell by a skeletal structure which is exterior of the shell and also supports recirculating ducts which draw off gases and unburned particles from the collector. Blowers reintroduce these gases and particles tangentially into the lower portion of the shell. The outlets of the blowers are spaced around the shell and each blower outlet is directed at a point just behind the next adjacent blower.

PATENTED DEB21 I97! SHEET 1 [1F 2 FIG.

JERRY S; LAUSMANN INVENTOR PATENTED UEEZI 19?:

saw 2 or 2 FIG. 2

III \32 JERRY S. LAUSMANN INVENTOR BUG/(HORN, BLORE, KLA/POU/S'T 8 SPAR/(MAN ATTORNEYS BURNER CONSTRUCTION This invention relates to improved smokeless burner constructions, and more particularly to improved vortex-type burners.

In my copending application, Ser. No. 828,l l3, filed May 26, 1969, entitled Burner Having Means For Eliminating Smoke, there is disclosed a burner including a shell in which a fire pile located at the bottom of the shell is supplied with underfire air and also is supplied with air and recirculated gases and unburned particles introduced tangentially into the shell by blowers drawing the gases and unburned particles from a collector mounted in the'upper, central portion of the shell. This burner is very effective to completely burn all waste. The recirculating components of the burner also can be readily installed in well built existing burner shells. However, some existing burner shells do not have sufficient structural strength to support he collector and it would be desirable to provide recirculating systems which can be successfully installed and used in all existing burner shells whether strong or weak structurally.

An object of the invention is to provide improved smokeless burner constructions. I

Another object of the invention is to provide improved vortex-type burners.

A further object of the invention is to provide recirculating systems which can be installed in existing burners without structural overloading the shells of the burners.

Another object of the invention is to provide a recirculating system for a burner in which the components of the recirculating system are supported independently of the shell of the burner.

A further object of the invention is to provide a vortex-type burner in which blower outlets spaced around a burner shell are each directed just behind the adjacent blower outlet proceeding in the same direction around the burner.

The invention provides improved smokeless burners in which collectors are suspended in the upper portions of burner shells by ringlike supports. In a burner forming one specific embodiment of the invention, a frustoconical collector is suspended in a burner shell by rods having turnbuckles and connected to a truss ring supported by a plurality of A- frame legs positioned around the exterior of the shell and also supporting blowers and recirculating ducts leading from the collector to the blowers. In a burner forming an alternate embodiment of the invention, a frustoconical collector is supported by a truss ring mounted on the upper, exterior portion of a burner shell. Preferably the outlets of blowers of each of the burners are directed into the burner shell at spaced points around the shell in the same general circular direction and each outlet is directed at a point just behind the next adjacent blower.

In the drawings:

FIG. I is a top plan view of an improved smokeless burner construction forming one embodiment of the invention;

FIG. 2 is a fragmentary vertical sectional view taken along line 2-2 of FIG. 1;

FIG. 3 is a fragmentary vertical view taken along line 3-3 of FIG. 1;

FIG. 4 is a horizontal sectional view of an improved smokeless bumer construction forming an alternate embodiment of the invention; and

FIG. 5 is a fragmentary vertical sectional view taken along line 5-5 of FIG. 4.

Referring now in detail to the drawings, there is shown in FIGS. 1-3 an improved smokeless burner construction forming one embodiment of the invention and including a collector in the form of an inverted cup having a frustoconical sidewall portion. The collector 20 preferably is of sheet steel and has eyes 22 welded thereto at spaced points therearound, and tie rods 24 having adjustable turnbuckles 26 therein are secured to the eyes 22 and to a ring 28 which may be a truss ring or a circular l-beam or other annular beam member providing both horizontal and vertical beam strength. The tie rods support the collector in the upper portion of and concentrically in a burner shell 30 of well-known, conventional type burner construction, and so support the collector entirely independently of the burner shell, the tie rods extending loosely through clearance holes 32 in the shell.

The ring 28 is held in a positioncentlered on the shell 30 and spaced radially outwardly from the shell by four trussed A- frames 40 which are supported on concrete bases 42. The A- frames support recirculation ducts 44 having inlets 46 opening into the collector 20 and outlets 48 coupled to inlets of blowers 50 which also are mounted on the A-frames. The blowers draw into themselves the gases and unburned particles from the collector and air from the atmosphere outside the burner shell through aspirating inlets 51, and blow the mixture almost tangentially into the lower portion of the burner shell to supply the exterior of a fire pile 52 of waste material with oxygen. Each outlet 54 of the blowers is directed counterclockwise, as viewed in FIG. 1, into the shell and just behind the next adjacent outlet 54. This provides maximum flow of the mixture introduced and the reintroduced unburned particles are burned and the oxygen of the air so introduced supports exterior combustion of the fire pile. A low-pressure underfire air system 60 like that disclosed an claimed in my above-mentioned copending application Ser. No. 828,] 13, filed May 26, 1969, supports interior combustion in the fire pile. Releasable clamps 61 clamp the ducts 44 to the A-frames 40.

The centerlines of the inlets 46 of the ducts 44 preferably open into the collector cone 20 at a level below the top of the cone 20 about one-third of the height of the cone 20. Thus, for a cone about 13.5 feet high, the centerlines of the inlets may be at a level about 64 inches below the top of the cone.

The products of combustion and some of the air and gases introduced into the shell by the blowers travel spirally around and up the interior of the shell with a coriolis or vortex effect. That is, the rising gases are very much like a whirlwind with a central, lower pressure area toward which heavier, solid particles migrate and travel up into the collector 20 and are drawn out of the collector by the ducts 44 to be reintroduced into the shell and fully burned. The fully burned, gaseous products of combustion tend to travel in the spirally, radially outwardly located portion of the rising column and pass between the collector and the inner wall of the shell and on upwardly and out of the shell. The independently mounted recirculating and air supply system may be easily assembled in existing burners, and imposes no loads on the burner shells. Hence, it may be used with structurally weak burner shells as well as strong burner shells. While the above-described burner construction is disclosed as having four equidistantly spaced blowers and four A- frames 40, the burner construction may have only three equidistantly spaced blowers and three A-frames supporting the blowers, or the burner construction may have six equidistantly spaced blowers supported by six A-frames, or, for smaller burner constructions, there may be four A-frames and only two blowers.

The above-described burner construction operates without emitting sparks, but if required by codes, may have a fiat screen at the top of the shell 30, the conventional, complex, crowned screen not being required.

EMBODIMENT OF FIGS. 4 and 5 An improved smokeless burner construction forming an alternate embodiment of the invention and shown in FIGS. 4 and 5 includes a collector like the collector 20. The collector 120 is suspended by tie rods I214 attached to eyes 122 and to a truss ring 28 forming a portion of a trusslike skeletal framework 29 of an otherwise conventional and well known burner shell 130, the burner shell being one of the better built shells and being well able to support during all usual operating conditions the collector and recirculating ducts 144. Blowers like the blowers 50 are mounted on bases I51 outside the shell 130. An underfire air system like the underfire air system 60 supplies air to the interior of fire pile 152. The

lOlOlS 0213 blowers 150 supply a mixture of air and recirculated gases and unburned particles tangentially into the burner shell to create the whirlwind effect. Instead of the four equidistantly spaced blowers 150 shown, there may be only three equidistantly spaced blowers 150, or there may be six equidistantly spaced blowers 150. The components of the above-described recirculating system are easily installed and maintained in any existing burner shell of moderate strength.

What is claimed is:

1. In a waste burner:

a vertical burner shell,

a collector,

a beamlike ring positioned exteriorly of the upper portion of the shell,

connecting means connecting the collector to the ring to support the collector in a position in the upper portion of the shell and spaced inwardly from the shell,

means including a plurality of leg means substantially independent of the shell and supporting the ring substantially independently of the shell.

2. The waste burner of claim 1 including a plurality of base means spaced around the exterior of the shell and supporting the leg means.

3. The waste burner of claim 1 including a plurality of recirculating ducts, means mounting the ducts on the ring and the leg means, and blower means connected to the ducts an having outlets directed tangentially into the lower portion of the shell.

4. The waste burner of claim 1 wherein the leg means comprise A-frames.

5. The waste burner of claim 1 wherein the ring comprises a truss ring.

6. The waste burner of claim 1 wherein the shell includes an exterior skeletal frame including the ring.

7. In an attachment for a waste burner having a shell; a plurality of leg means, base means supporting the leg means, ring means connected to the upper end portions of the leg means and supported thereby, collector means supported by the ring means, a plurality of ducts extending along the leg means to the collector means, and blower means supported by the base means and having a plurality of outlets directed chordally into the lower portion of the shell. 8. The waste burner of claim 2 wherein the leg means an the ducts are positioned exteriorly of the shell.

9. The waste burner of claim 8 wherein the ring means is a beamlike ring supported by the leg means.

10. The waste burner of claim 9 wherein the collector means is an inverted cup.

11. The waste burner of claim 7 wherein the leg means comprises a plurality of A-frames.

lOlOlS 02H Patent 3628472 Dated December 21, 1971 Inventor (s) JERRY S LAUSMANN It is certified that error appears in the above-identified patent and that said Letters Patent are hereby'corrected as shown below:

Column 1, line 16, change "he" to --the-- Column 2, line 22, change "an" to --and-- Column 3, line 26, after "ducts" change "an" to --and-- Column 4, line 19, change "2" to ---7-- Signed and sealed this 30th day of May 1972.

(SEAL) Attest:

EDWARD M.FLETCHER, JR. ROBERT GOTTSCHALK Attesting Officer Commissioner of Patents F ORM PO-1050 (10-69) USCOMM'DC 60376-P69 U.5, GOVERNMENT PRINTING OFFICE: I909 0*356-334 

1. In a waste burner: a vertical burner shell, a collector, a beamlike ring positioned exteriorly of the upper portion of the shell, connecting means connecting the collector to the ring to support the collector in a position in the upper portion of the shell and spaced inwardly from the shell, means including a plurality of leg means substantially independent of the shell and supporting the ring substantially independently of the shell.
 2. The waste burner of claim 1 including a plurality of base means spaced around the exterior of the shell and supporting the leg means.
 3. The waste burner of claim 1 including a plurality of recirculating ducts, means mounting the ducts on the ring and the leg means, and blower means connected to the ducts an having outlets directed tangentially into the lower portion of the shell.
 4. The waste burner of claim 1 wherein the leg means comprise A-frames.
 5. The waste burner of claim 1 wherein the ring comprises a truss ring.
 6. The waste burner of claim 1 wherein the shell includes an exterior skeletal frame including the ring.
 7. In an attachment for a waste burner having a shell; a plurality of leg means, base means supporting the leg means, ring means connected to the upper end portions of the leg means and supported thereby, collector means supported by the ring means, a plurality of ducts extending along the leg means to the collector means, and blower means supported by the base means and having a plurality of outlets directed chordally into the lower portion of the shell.
 8. The waste burner of claim 2 wherein the leg means and the ducts are positioned exteriorly of the shell.
 9. The waste burner of claim 8 wherein the ring means is a beamlike ring supported by the leg means.
 10. The waste burner of claim 9 wherein the collector means is an inverted cup.
 11. The waste burner of claim 7 wherein the leg means comprises a plurality of A-frames. 